Noun

usage: someone who refuses to conform to established standards of conduct

Adjective

1. nonconformist (vs. conformist), unconformist

usage: not conforming to some norm or socially approved pattern of behavior or thought; "their rabidly nonconformist deportment has made them legendary"; "the old stubborn nonconformist spirit of the early settlers"

2. nonconforming, nonconformist, unorthodox (vs. orthodox)

usage: not conforming to established customs or doctrines especially in religion